MESON Chess Problem Database

Problem Display
PID: 176582 (b3nN2/r3Q2q/1b6/1P2NR2/4k1r1/1P1RP1p1/2P1K1P1/1B6 w - - 0 1)

Mirri, Giorgio

Piatesi, Antonio

Schach-Echo, 1975

b3nN2/r3Q2q/1b6/1P2NR2/4k1r1/1P1RP1p1/2P1K1P1/1B6

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rxf4#
    • 1...Rg5
      • 2.Rf4#
    • 1...Rg6
      • 2.Rf4#
    • 1...Rg7
      • 2.Rf4#
    • 1...Rg8
      • 2.Rf4#
  • Tries
    • 1.Sxg4+?
      • 1...Qxe7
        • 2.Rf4#
      • 1...Rxe7
        • 2.Rf4#
      • 1...Kxf5!
    • 1.Sed7+?
      • 1...Kxf5
        • 2.Qe5#
      • 1...Qxe7!
    • 1.Sf7+?
      • 1...Kxf5
        • 2.Qe5#
        • 2.Qe6#
      • 1...Rxe7!
    • 1.Rd4+?
      • 1...Bxd4
        • 2.c4#
      • 1...Kxf5!
  • Keys
    • 1.Rd5!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.Seg6#
      • 1...Kxf5
        • 2.Sc6#
      • 1...Qh1
        • 2.Sed7#
      • 1...Ra1
        • 2.Sf7#
      • 1...Ra2
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::R1(J),XR(c)
    • R(c);N_GUARD::R1(J)
  • Tries
    • Try
      • S(I);CHECK,XR(c)
      • Vars
        • Q(f);XQ(K)::R1(J)
        • R(e);XQ(K)::R1(J)
      • Refutation
        • K(b);S_FLIGHT,XR(J)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(J)::QAR1(K)
      • Refutation
        • Q(f);XQ(K)
    • Try
      • S(I);CHECK
      • Refutation
        • R(e);XQ(K)
    • Try
      • R(F);CHECK
      • Vars
        • B(d);XR(F)::B(A)+P(B)
      • Refutation
        • K(b);S_FLIGHT,XR(J)
  • Actual
    • R(F);
    • Threat
      • B(A)+P(B)
    • Vars
      • K(b);S_FLIGHT,XR(F)::R(J)+S(I)
      • K(b);S_FLIGHT,XR(J)::R(F)+S(I)
      • Q(f);N_GUARD::QAR(K)+S(I)
      • R(e);N_GUARD::QAR(K)+S(I)
      • R(e);N_GUARD,P_PINP(B)::QAR(K)+S(I)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).